Caged Ball LM Guide SPR/SPS - THK Technical Support

Caged Ball
LM Guide
SPR / SPS
Adopts 8 Rows of Raceways
Achieves Super-Low Waving and Ultra-High Rigidity
For details, visit THK at www.thk.com
Product information is updated regularly on the THK website.
CATALOG No.362-1E

aged Ball
M Guide
New Advanced LM Guide
Achieves super-low waving and ultra-high rigidity by adopting
8 rows of raceways in the LM Guide.
These models adopt (1) 8 rows of raceways, (2) small-diameter balls and (3) super-long
blocks, in order to realize super-low waving and ultra-high rigidity that surpass the
conventional LM Guide. With this approach, the number of effective balls is
substantially increased, and the amplitude of the rolling element in motion is
minimized. The new models realize super-low waving comparable to hydrostatic
guides. In addition, the deformation of the ball is minimized to achieve ultra-high
rigidity that surpasses even roller guides. The two models contribute to higher
accuracy of equipment.

Cross section of
Radial type model SPR
Cross section of
4-way type model SPS
Primary applications
Super-precision processing machines/High-precision machining center
/Lathe/Surface grinder/Semiconductor manufacturing equipment/
FPD manufacturing machines/High-performance measuring machines

aged Ball
M Guide
Super-low waving and ultra-high rigidity have been verified.
[Waving evaluation]
The waving values of models SPR/SPS
are approximately 1/10 of that (100 to 300 nm)
of conventional ordinary LM Guides.
Conditions
Tested model
Rail span
Block span
Measurement point
Measurement direction
SPS25LR
250mm
250mm
250 mm above the center of the table
Vertical and horizontal
Appearance of the specimen
Waving (vertical direction)
Deflectionm Deflectionm
Straightness (vertical direction)
Strokemm
Straightness (horizontal direction)
Strokemm
[Rigidity comparison evaluation]
Models SPR/SPS achieve very high rigidity.
Deflectionm
Deflectionm
Strokemm
Waving (horizontal direction)
Strokemm
* Internal evaluation record
Deflectionm
SPS25LR
Roller guide
Conventional ball guide
Radial rigidity
Deflectionm
Reverse radial rigidity
SPS25LR
Roller guide
Conventional ball guide
Applied loadkN
Applied loadkN
* This test was intended to compare the clearance C1.

Product Overview
Caged Ball LM Guide
Rated Loads in All Directions
Models SPR/SPS are capable of receiving loads in all four directions: radial, reverse-radial and lateral directions.
The basic load ratings of model SPR are represented by the symbols in the radial direction indicated in the fi gure on the right,
and the actual values are provided in the dimensional tables* 1 for SPR. The values in the reverse-radial and lateral directions
of model SPR are obtained from the table.
The basic load ratings of model SPS are equal in all the four directions (radial, reverse radial and lateral directions), and their
actual values are provided in the specifi cation table* 1 for SPS.
Rated Loads in All Directions with Model SPR
Model SPR
Direction Basic dynamic
load rating
Basic static
load rating
Radial direction C C 0
Reverse-radial
direction
C L=0.71C C 0L=0.71C 0
Lateral direction C T=0.44C C 0T=0.35C 0
*1: Dimensional table for models SPR/SPS
Model SPR-LR page 9
Model SPS-LR page 11
Equivalent Load
When the LM block of model SPR receives a reverse-radial load and a lateral load simultaneously, the equivalent load is
obtained from the equation below.
Equivalent Factor of Model SPR
P E X Y
Equivalent load in reverseradial
direction
1 2
PE Equivalent load [N]
Note: If a reverse-radial load and a horizontal load are simultaneously applied,
calculate the equivalent reverse-radial load.
Reverse-radial direction
PL Reverse-radial load [N]
PT Lateral load [N]
X, Y Equivalent factor
When the LM block of model SPS receives loads in all directions simultaneously, the equivalent load is obtained from the
equation below.
PE
Equivalent load [N]
Radial direction
Reverse-radial direction
PR Radial load [N]
PL
PT
Reverse-radial load [N]
Lateral load [N]

Product Overview
Caged Ball LM Guide
Service life
The service life of an LM Guide is subject to variations even under the same operational conditions. Therefore, it is necessary
to use the nominal life defi ned below as a reference value for obtaining the service life of the LM Guide.
[Nominal life]
The nominal life means the total travel distance that 90% of
a group of units of the same LM Guide model can achieve
without fl aking (scale-like pieces on the metal surface) after
individually running under the same conditions.
*1 : Basic dynamic load rating (C)
It refers to a load with a constant magnitude and direction under
which the nominal life (L) of a group of identical LM Guide units
independently operating is 50 km.
L : Nominal life [km]
C : Basic dynamic load rating* 1 [N]
PC : Calculated load [N]
fH : Hardness factor (see Fig.1)
fT : Temperature factor
fC : Contact factor (see Table1)
fW : Load factor (see Table2)
[Service life time]
Once the nominal life (L) has been obtained, the service life
time can be obtained using the equation on the right if the
stroke length and the number reciprocations are constant.
Lh : Service life time [h]
s : Stroke length [mm]
n1 : Number of reciprocations per minute [min -1 ]
fH: Hardness Factor
To ensure the achievement of the optimum load capacity of the LM Guide,
the raceway hardness must be between 58 and 64 HRC.
If the hardness is lower than this range, the basic dynamic load rating and
the basic static load rating decrease. Therefore, it is necessary to multiply
each rating by the respective hardness factor (fH).
Since the LM Guide has suffi cient hardness, the fH value for the LM Guide is
normally 1.0 unless otherwise specifi ed.
Hardness factor fH
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
60 50 40 30 20 10
Raceway hardness (HRC)
Fig.1 Hardness factor (fH)
fT: Temperature factor
Since the service temperature of Caged Ball LM Guides is normally 80°C or
below, the fT value is 1.0.
fC: Contact Factor
When multiple LM blocks are used in close contact with each other, it
is diffi cult to achieve uniform load distribution due to moment loads and
mounting-surface accuracy. When using multiple blocks in close contact
with each other, multiply the basic load rating (C or C0) by the corresponding
contact factor indicated in Table1.
Note) If uneven load distribution is expected in a large machine, take into
account the respective contact factor indicated in Table1.
Table 1 Contact Factor (fC)
Number of blocks used in close contact Contact factor f C
2 0.81
3 0.72
4 0.66
5 0.61
6 or more 0.6
Normal use 1
fW: Load Factor
In general, reciprocating machines tend to involve vibrations or impact
during operation. It is extremely diffi cult to accurately determine all vibrations
generated during high-speed operation and impact during frequent start
and stop.
Therefore, where the effects of speed and vibration are estimated to be
signifi cant, divide the basic dynamic load rating (C) by a load factor selected
from Table2, which contains empirically obtained data.
Table 2
Load Factor (fW)
Vibrations/impact Speed (V) f W
Faint
Very low
V0.25m/s
1 to 1.2
Weak
Low
0.25

Accuracy Standard
The accuracy of model SPR/SPS is specifi ed in terms of running parallelism (* 1 ), dimensional tolerance for height and width,
and height and width difference between a pair (* 2, * 3 ) when two or more LM blocks are used on one rail or when two or more
rails are mounted on the same plane.
The accuracy of model SPR/SPS is categorized into Super precision grade (SP) and Ultra precision grade (UP) by model
numbers, as indicated in the table below.
C
*1 : Running of Parallelism
Refers to the tolerance for parallelism between the LM block
D
and the LM rail reference surface when the LM block travels
the whole length of the LM rail with the LM rail secured on the
reference reference surface using bolts.
M
*2 : Difference in Height M
Indicates a difference between the minimum and maximum
values of height (M) of each of the LM blocks used on the same
plane in combination.
*3 : Difference in Width W2
A
B
Indicates a difference between the minimum and maximum
values of the width (W2) between each of the LM blocks, mounted
on one LM rail in combination, and the LM rail.
W2
Unit: mm
Accuracy standard Super precision grade Ultra precision grade
Model No.
Item SP UP
Dimensional tolerance in
height M
0
-0.02
0
-0.01
Difference in height M 0.005 0.003
Dimensional tolerance in
0
0
SPR/SPS25
width W 2 -0.015
-0.01
SPR/SPS30
SPR/SPS35 Difference in width W 2 0.005 0.003
Running parallelism of surface C
against surface A
as shown in the table below
Running parallelism of surface D
against surface B
as shown in the table below
Dimensional tolerance in
height M
0
-0.03
0
-0.015
Difference in height M 0.005 0.003
Dimensional tolerance in
0
0
width W 2 -0.025
-0.015
SPR/SPS45
Difference in width W 2 0.005 0.003
Running parallelism of surface C
against surface A
as shown in the table below
Running parallelism of surface D
against surface B
as shown in the table below
LM Rail Length and Running Parallelism by Accuracy Standard for Models SPR/SPS
Unit:m
LM rail length [mm]
Running Parallelism Values
Above
Or less
Super precision grade Ultra precision grade
SP
UP
50 1.5 1
50 80 1.5 1
80 125 1.5 1
125 200 1.5 1
200 250 1.5 1
250 315 1.5 1
315 400 2 1.5
400 500 2.5 1.5
500 630 3 2
630 800 3.5 2
800 1000 4 2.5
1000 1250 4.5 3
1250 1600 5 4
1600 2000 5.5 4.5
2000 2500 6 5
2500 3090 6.5 5.5

Product Overview
Caged Ball LM Guide
Since the radial clearance of an LM Guide greatly affects the running accuracy, load carrying capacity and rigidity of the LM
Radial Clearance Standard
Guide, it is important to select an appropriate clearance according to the application.
Unit:m
Indication symbol Light Preload Medium Preload
Model No.
C1
C0
SPR/SPS25 -8 to -5 -10 to -8
SPR/SPS30 -8 to -5 -12 to -9
SPR/SPS35 -9 to -5 -13 to -10
SPR/SPS45 -11 to -7 -16 to -12
*1 : Preload
Preload is an internal load applied to the rolling elements (balls,
rollers, etc.) of an LM block in advance in order to increase its
rigidity.
The clearances of all model SPR/SPS units are adjusted as
specifi ed before shipment, therefore they do not need further
preload adjustment.
Shoulder Height of the Mounting Base and the Corner Radius
Shoulder for the LM Rail
Radial clearance
Normally, the mounting base for the LM rail and the LM block has a reference-surface on the side face of the shoulder of the
base in order to allow easy installation and highly accurate positioning.
The corner of the mounting shoulder must be machined to have a recess, or machined to be smaller than the corner radius
"r," to prevent interference with the chamfer of the LM rail or the LM block.
Shoulder for the LM Block
Unit: mm
Model No.
Corner radius for
the LM rail
Shoulder height for
the LM rail
Corner radius for
the LM block
Shoulder height for
the LM block
r 1 (max)
H 1
r 2 (max)
H 2
H 3
SPR/SPS25 0.5 3.5 1 5 4.5
SPR/SPS30 1 4 1 6 5
SPR/SPS35 1 5 1 7 6
SPR/SPS45 1 7 1.5 8 8

Error Allowance in the Parallelism between Two Rails
A mounting surface error of the LM Guide may affect the service life. The following tables show approximate error allowances
in parallelism (P) between two rails in general use.
Unit: m
Model No. Clearance C0 Clearance C1
SPR/SPS25 7 8.5
SPR/SPS30 9 10.5
SPR/SPS35 10.5 13
SPR/SPS45 14.5 17.5
Error Allowance in Vertical Level between Two Rails
The values in the tables represent error allowances in vertical level (S) between two rails per axis-to-axis distance of 500 mm,
and are proportionate to the axis-to-axis distances.
Unit: m
Model No. Clearance C0 Clearance C1
SPR 75 120
SPS 70 105
Error Allowance in Level in the Axial Direction
The values in the table represent level error allowances (Y) in the axial direction per 500 mm in distance between the LM blocks,
and are proportional to the distance between the LM blocks.
Unit: m
Model No. Clearance C0 Clearance C1
SPR 9 16
SPS 14 21

Dimensional Table
Caged Ball LM Guide
Model SPR-LR
Model
No.
Outer dimensions
LM block dimensions
Height Width Length Mounting hole
M W L B C C S L 1 T K N f o E e o D o
Grease
nipple
SPR25LR 31 72 180.1 47 40 120 M810.5 158.1 10 26.5 6.3 9.2 12 4.5 3.9 B-M6F
SPR30LR 38 90 207.8 58 45 135 M1014 182.6 12 33 8.0 10.9 12 4.5 3.9 B-M6F
SPR35LR 44 100 235.5 66 50 150 M1216 208.3 14 38 9.5 12.4 12 6 5.2 B-M6F
SPR45LR 52 120 288.5 78 65 195 M1418.5 256.5 16 44 10.5 12.3 16 6 5.2 B-PT1/8
Model number coding
Model number
With QZ
Lubricator
No. of LM blocks
used on the same
rail
Contamination
protection
accessory
symbol
(see page 16)
LM rail length
(in mm)
Radial clearance
symbol (see page 7)
Symbol for No.
of rails used on
the same plane
Type of LM block
Accuracy symbol
(see page 6)
Note) This model number indicates that an LM block and an LM rail constitute one set (i.e., the required number of sets when 2 rails are used in parallel is 2).
We recommend mounting the grease nipple in the standard position. If desiring to mount it on the side or in other positions, contact THK.

Unit: mm
LM rail dimensions Basic load rating Static permissible moment [kN-m]* 3 Mass
Width Height Pitch Mounting hole Length C C o
M A M B M C LM block LM rail
H 3
W 1
0
-0.05
W 2 M 1 F d 1d 2h Max* 2 [kN] [kN]
1
block Double
blocks
1
block Double
blocks
1
block
4.5 35 18.5 18.2 40 91412 2680 59.9 156 3.22 14.5 1.69 7.59 1.72 1.5 4.1
[kg]
[kg/m]
5 45 22.5 21.4 52.5 1117.514 3090 83.2 212 5.08 22.7 2.66 11.9 3.02 2.7 6.9
6 50 25 25 52.5 142017 3090 111 278 7.56 33.6 3.96 17.6 4.37 4.0 9.0
8 60 30 30.2 60 162320 3060 178 434 13.8 64.4 7.73 33.7 8.05 7.0 11.6
*1 Pilot holes for side nipples are not drilled through in order to prevent foreign material from entering the product.
THK will mount grease nipples per your request. Therefore, do not use the side nipple pilot holes for purposes other than mounting a grease nipple.
*2 The maximum length under Length indicates the standard maximum length of an LM rail.
*3 Static permissible moment: 1 block: static permissible moment value with 1 LM block
Double blocks: static permissible moment value with 2 blocks closely contacting with each other
*4 In case of oil lubrication, be sure to let THK know the mounting orientation and the exact position in each LM block where the piping joint should be attached.

Dimensional Table
Caged Ball LM Guide
Model SPS-LR
Outer dimensions
LM block dimensions
Model
No.
Height Width Length
M W L B
Mounting hole
Pitch
C
C S L 1 T K N f o E e o D o
Grease
nipple
SPS25LR 31 72 180.1 47 40 120 M810.5 158.1 10 26.5 6.3 9.2 12 4.5 3.9 B-M6F
SPS30LR 38 90 207.8 58 45 135 M1014 182.6 12 33 8.0 10.9 12 4.5 3.9 B-M6F
SPS35LR 44 100 235.5 66 50 150 M1216 208.3 14 38 9.5 12.4 12 6 5.2 B-M6F
SPS45LR 52 120 288.5 78 65 195 M1418.5 256.5 16 44 10.5 12.3 16 6 5.2 B-PT1/8
Model number coding
Model number
With QZ
Lubricator
No. of LM blocks
used on the same
rail
Contamination
protection
accessory
symbol
(see page 16)
LM rail length
(in mm)
Radial clearance
symbol (see page 7)
Symbol for No.
of rails used on
the same plane
Type of LM block
Accuracy symbol
(see page 6)
Note) This model number indicates that an LM block and an LM rail constitute one set (i.e., the required number of sets when 2 rails are used in parallel is 2).
We recommend mounting the grease nipple in the standard position. If desiring to mount it on the side or in other positions, contact THK.

Unit: mm
LM rail dimensions Basic load rating Static permissible moment [kN-m]* 3 Mass
Width Height Pitch Mounting hole Length C C o
M A M B M C LM block LM rail
H 3
W 1
0
-0.05
W 2 M 1 F d 1d 2h Max* 2 [kN] [kN]
1
block Double
blocks
1
block Double
blocks
1
block
4.5 35 18.5 18.2 40 91412 2680 42.4 110 2.91 13.1 2.91 13.1 1.38 1.5 4.1
[kg]
[kg/m]
5 45 22.5 21.4 52.5 1117.514 3090 58.8 150 4.59 20.6 4.59 20.6 2.44 2.7 6.9
6 50 25 25 52.5 142017 3090 78.2 196 6.83 30.4 6.83 30.4 3.52 4.0 9.0
8 60 30 30.2 60 162320 3060 126 307 13.2 58.2 13.2 58.2 6.46 7.0 11.6
*1 Pilot holes for side nipples are not drilled through in order to prevent foreign material from entering the product.
THK will mount grease nipples per your request. Therefore, do not use the side nipple pilot holes for purposes other than mounting a grease nipple.
*2 The maximum length under Length indicates the standard maximum length of an LM rail.
*3 Static permissible moment: 1 block: static permissible moment value with 1 LM block
Double blocks: static permissible moment value with 2 blocks closely contacting with each other
*4 In case of oil lubrication, be sure to let THK know the mounting orientation and the exact position in each LM block where the piping joint should be attached.

Dimensional Table
Caged Ball LM Guide
Standard Length and Maximum Length of the LM Rail
Table1 shows the standard LM rail lengths and the maximum lengths of models SPR/SPS variations.
For the G dimension when a special length is required, we recommend selecting the corresponding G value from the table.
The longer the G dimension is, the less stable the G area may become after installation, thus causing an adverse impact to
accuracy.
G F F
G
L0
Standard Length and Maximum Length of the LM Rail for Models SPR/SPS
Unit: mm
Model No. SPR/SPS 25 SPR/SPS 30 SPR/SPS 35 SPR/SPS 45
280 570 570 780
360 675 675 900
440 780 780 1020
520 885 885 1140
600 990 990 1260
680 1095 1095 1380
760 1200 1200 1500
840 1305 1305 1620
920 1410 1410 1740
1000 1515 1515 1860
1080 1620 1620 1980
1160 1725 1725 2100
1240 1830 1830 2220
LM rail standard length (L0)
1320 1935 1935 2340
1400 2040 2040 2460
1480 2145 2145 2580
1560 2250 2250 2700
1640 2355 2355 2820
1720 2460 2460 2940
1800 2565 2565 3060
1880 2670 2670
1960 2775 2775
2040 2880 2880
2200 2985 2985
2360 3090 3090
2520
2680
Standard pitch F 40 52.5 52.5 60
G 20 22.5 22.5 30
Max length 2680 3090 3090 3060
Note: If jointed rails are not allowed.

SPR/SPS OPTIONS
Options
For models SPR/SPS, contamination protection and lubrication accessories
are available. Make a selection according to the application and the installation site.
End Seal
Double Seals
Laminated Contact
Scraper LaCS
Metal Scraper
(Non-contact)
QZ Lubricator
Inner Seal
C/GC Caps exclusively
for LM rail mounting holes
*Requires special Rail
Side Seal

Options
Caged Ball LM Guide
Contamination Protection Accessories
When foreign material enters an LM system, it will cause abnormal wear or shorten the service life. It is necessary to prevent
foreign material from entering the system. Therefore, when possible entrance of foreign material is predicted, it is important to
select an effective sealing device or dust-prevention device that meets the working conditions.
to Seals
Side Seal
Highly wear-resistant end seals made of special resin rubber
and side seals for increased dust-prevention effect are
available.
Used in locations where dust may enter the LM block from the
side or bottom surface, such as vertical, horizontal and
inverted mounts
If desiring a contamination protection accessory, specify it with the corresponding
symbol indicated in table 3.
For the supported LM Guide model numbers for contamination protection
accessories and the overall LM block length with a contamination protection
accessory attached (dimension L), see table 4.
Seal resistance value
For the maximum seal resistance value per LM block when a lubricant is applied
on seal UU/SS, refer to the corresponding value provided in table 1.
Side Seal
Table 1 Maximum Seal Resistance Value of Seals SPR/SPS UU
Unit: N
Model No. Seal UU Seal SS
SPR/SPS25 3 7
SPR/SPS30 5 11
SPR/SPS35 8 16
SPR/SPS45 10 20
Inner Seal
Used in locations severely exposed to dust or cutting chips
Inner Seal
End Seal
Used in locations exposed to dust
Double Seals
Used in locations exposed to much dust or many cutting
chips
End Seal
End Seal

Scrapers
Laminated Contact Scraper LaCS®
For locations with an even more adverse working conditions,
the Laminated Contact Scraper LaCS is available.
LaCS removes minute foreign material adhering to the LM
rail in multiple stages and prevents it from entering the LM
block with a laminated contact structure (3-layer scraper).
Features
Since the 3 layers of scrapers fully contact the LM rail, LaCS is highly capable
of removing minute foreign material.
Since it uses oil-impregnated, foam synthetic rubber with a self-lubricating
function, low friction resistance is achieved.
Basic Specifi cations of LaCS
Service temperature range of LaCS: -20°C to +80°C
Resistance of LaCS (for Reference): indicated in table 2
*Note that LaCS is not sold alone.
Table 2 Resistance of LaCS
Model No.
Maximum resistance
SPR/SPS25 13.0
SPR/SPS30 20.2
SPR/SPS35 22.9
SPR/SPS45 27.4
Unit: N
Note 1: Each resistance value in the table only consists of that of LaCS, and does
not include sliding resistances of seals and other accessories.
Note 2: For the maximum service speed of LaCS, contact THK.
LaCS
Used in harsh environments exposed to foreign material such
as fi ne dust and liquids.
Ball cage
Ball
Contact scraper
Liquid
Large amount of
foreign material
Metal Scraper (Non-contact)
Used in locations where welding spatter may adhere to the LM
rail.
Metal scraper
Table 3
Symbols of Contamination Protection Accessories for Models SPR/SPS
Symbol Contamination protection accessory
UU With end seal
SS With end seal + side seal + inner seal
DD With double seals + side seal + inner seal
ZZ With end seal + side seal + inner seal + metal scraper
KK With double seals + side seal + inner seal + metal scraper
SSHH With end seal + side seal + inner seal + LaCS
DDHH With double seals + side seal + inner seal + LaCS
ZZHH
KKHH
With end seal + side seal + inner seal + metal scraper + LaCS
With double seals + side seal + inner seal + metal scraper + LaCS
For the incremental dimension for mounting the grease nipple, contact THK.
Table 4
Overall LM Block Length (Dimension L) of Models SPR/SPS with a Contamination Protection Accessory Attached
Model No. SSUU DD ZZ KK SSHH DDHH ZZHH KKHH
SPR/SPS25 180.1 187.5 185.8 193.2 200.4 207.8 202.8 210.2
SPR/SPS30 207.8 216.2 214.3 222.7 231.1 239.5 234.3 242.7
SPR/SPS35 235.5 243.9 242 250.4 258.8 267.2 262 270.4
SPR/SPS45 288.5 297.9 295 304.4 311.8 321.2 315 324.4

Options
Caged Ball LM Guide
Dedicated C-cap for LM Rail Mounting Holes
If any of the LM rail mounting holes of an LM Guide is fi lled with
cutting chips or foreign material, they may enter the LM block
structure. Entrance of such foreign material can be prevented by
covering each LM rail mounting hole with the dedicated cap.
Since the dedicated cap C for LM rail mounting holes uses a special synthetic
resin with high oil resistance and high wear resistance, it is highly durable.
When placing an order, specify the respective cap C model number from the
table below. The cap can also be made of other material (e.g., metal). For
details, contact THK.
Model No.
Model No. Bolt Main dimensionsmm
for C Cap used D H
SPR/SPS25 C8 M8 14.4 3.7
SPR/SPS30 C10 M10 18.0 3.7
SPR/SPS35 C12 M12 20.5 4.7
SPR/SPS45 C14 M14 23.5 5.7
Dedicated C-cap for the LM rail mounting hole
It prevents cutting chips from entering the LM rail mounting
hole.
H
D
Metal Cap Dedicated for LM Rail Mounting Holes GC Cap
GC cap is a metallic cap that plugs the LM rail mounting hole (article
compliant with the RoHS Directives). It prevents the entrance of
foreign material and coolant from the LM rail top face (mounting hole)
under harsh environments, and signifi cantly increases the dust control
performance of the LM Guide if used with a dust control seal.
Cap GC
D
Model No.
Model No. Bolt Main dimensionsmm
for GC Cap used D H
SPR/SPS25 GC8 M8 14.36 3.5
SPR/SPS30 GC10 M10 17.86 3.5
SPR/SPS35 GC12 M12 20.36 4.6
SPR/SPS45 GC14 M14 23.36 5.0
H
If designating an LM Guide model attached with GC cap, observe
the following example of model number coding.
Model number coding
With GC cap
* Add the symbol (GC) to the
end of the model number.
The procedure for inserting a GC cap into a mounting hole
consists of using a fl at aligning fi tting to gradually punch the
cap into the hole until it is level with the upper surface of the
LM rail, as shown in the fi gure. Fit GC caps without removing
the LM rail from the LM block.
Note1) LM guides with GC caps are special rails.
Note2) They cannot be mounted on stainless steel LM rails or LM rails that have
undergone surface treatment.
Note3) If this product will be used in special environments, such as in a vacuum or
at very low or high temperatures, contact THK.
Note4) GC caps are not sold individually. They are sold as a set with LM guides.
Note5) The openings of LM rail mounting holes are not chamfered. Take care not to
injure your hands while working.
Note6) After fi tting GC caps, the upper surface of the LM rail must be fl attened and
cleaned (wiped).
Dedicated Bellows
For details of the dedicated bellows, contact THK.
GC Cap
Plastic hammer
Flat metal piece

Lubrication Accessories
QZ Lubricator
QZ Lubricator feeds the right amount of lubricant to the
raceway on the LM rail. This allows an oil fi lm to continuously
be formed between the rolling element and the raceway,
and drastically extends the lubrication and maintenance
intervals.
When the QZ Lubricator is required, specify the desired type with the corresponding
symbol indicated in table 5.
For supported LM Guide model numbers for the QZ Lubricator and the overall block
length with the QZ Lubricator attached (L dimension), see table 6.
Features
QZ Lubricator
Case
Heavily oil-impregnated fiber net
High-density fiber net
Ball
Since it supplements an oil loss, the lubrication maintenance interval can be
significantly extended.
Eco-friendly lubrication system that does not contaminate the surrounding
area since it feeds the right amount of lubricant to the ball raceway.
The user can select a type of lubricant that meets the intended use.
Signifi cantly Extended Maintenance Interval
Attaching QZ Lubricator helps extend the maintenance interval throughout the
whole load range from the light load area to the heavy load area.
*Note that the QZ Lubricator is not sold alone.
Table 5
Parts Symbols for Models SPR/SPS with the QZ Lubricator Attached
Symbol Contamination protection accessories for LM Guide with QZ Lubricator attached
QZUU With end seal + QZ Lubricator
QZSS With end seal + side seal + inner seal + QZ Lubricator
QZDD With double seals + side seal + inner seal + QZ Lubricator
QZZZ With end seal + side seal + inner seal + metal scraper + QZ Lubricator
QZKK With double seals + side seal + inner seal + metal scraper + QZ Lubricator
QZSSHH With end seal + side seal + inner seal + LaCS + QZ Lubricator
QZDDHH With double seals + side seal + inner seal + LaCS + QZ Lubricator
QZZZHH With end seal + side seal + inner seal + metal scraper + LaCS + QZ Lubricator
QZKKHH With double seals + side seal + inner seal + metal scraper + LaCS + QZ Lubricator
For the incremental dimension for mounting the grease nipple, contact THK.
Oil control plate
Flow of lubricant Ball cage
The structure of the QZ Lubricator consists
of three major components:
a heavy oil-impregnated fiber net (functions to store lubricant).
a high-density fiber net (functions to apply lubricant to the raceway).
an oil-control plate (functions to adjust oil flow).
The lubricant contained in the QZ Lubricator is fed by the capillary
phenomenon, which is used also in felt pens and many other products,
as the fundamental principle.
Table 6
Overall LM Block Length (Dimension L) of Models SPR/SPS with the QZ Lubricator Attached
Model No. QZUUSS QZDD QZZZ QZKK QZSSHH QZDDHH QZZZHH QZKKHH
SPR/SPS25 202.1 209.5 207.8 215.2 222.4 229.8 224.8 232.2
SPR/SPS30 229.8 238.2 236.3 244.7 253.1 261.5 256.3 264.7
SPR/SPS35 267.5 275.9 274 282.4 290.8 299.2 294 302.4
SPR/SPS45 320.5 329.9 327 336.4 343.8 353.2 347 356.4

Caged Ball LM Guide SPR/SPS
Precautions on use
Handling
· This product consists mostly of heavy items (20 kg or more). When moving heavy items, use 2 or more people or moving equipment. This
could cause injury or product damage.
· Do not disassemble the parts. This will cause dust to enter the product resulting in loss of functionality.
· Tilting an LM block or LM rail may cause them to fall by their own weight.
· Take care not to drop or strike the LM guide. This could cause injury or product damage. Giving an impact to it could also cause damage to its
function even if the product looks intact.
· Prevent foreign material, such as dust or cutting chips, from entering the system. This could cause damage to ball circulation components and
loss of functionality.
· When planning to use the LM system in an environment where the coolant penetrates the LM block, it may cause trouble to product functions
depending on the type of the coolant. Contact THK for details.
· Do not use the product at temperature of 80 or higher. Contact THK if you desire to use the product at a temperature of 80 or higher.
· If foreign material such as dust or cutting chips adheres to the product, replenish the lubricant after cleaning the product with pure white
kerosene. For available types of detergent, contact THK.
· If an LM guide will be in an inverted orientation, take preventive measures such as adding a safety mechanism to prevent falls. If the end plate
is damaged due to an accident, etc., balls may fall out of the guide or the LM block become detached from the LM rail and fall down.
· When using the product in locations exposed to constant vibrations or in special environments such as clean rooms, vacuum and low/high
temperature, contact THK in advance.
· When removing the LM block from the LM rail and then replacing the block, an LM block mounting/ removing jig that facilitates such
installation is available. Contact THK for details.
· When installing the LM Guide, be sure not to remove the LM block from the LM rail to the extent possible. If removing and reattaching the LM
block is inevitable, contact THK.
Lubrication
· Thoroughly remove anti-rust oil and feed lubricant before using the product.
· Do not mix lubricants of different physical properties.
· In locations exposed to constant vibrations or in special environments such as clean rooms, vacuum and low/high temperature, normal
lubricants may not be used. Contact THK for details.
· When planning to use a special lubricant, contact THK before using it.
· When adopting oil lubrication, the lubricant may not be distributed throughout the LM system depending on the mounting orientation of the
system. Contact THK for details.
· Lubrication interval varies according to the conditions. Contact THK for details.
Storage
When storing the LM Guide, enclose it in a package designated by THK and store it in a horizontal
orientation while avoiding high temperature, low temperature and high humidity.
“LM GUIDE,” and “ ” are registered trademarks of THK CO., LTD.
●The photo may differ slightly in appearance from the actual product.
●The appearance and specifications of the product are subject to change without notice. Contact THK before placing an order.
●Although great care has been taken in the production of this catalog, THK will not take any responsibility for damage resulting from typographical errors or omissions.
●For the export of our products or technologies and for the sale for exports, THK in principle complies with the foreign exchange law and the Foreign Exchange and
Foreign Trade Control Law as well as other relevant laws.
For export of THK products as single items, contact THK in advance.
All rights reserved
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©THK CO., LTD.
201208020 E18 Printed in Japan